<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>轮播图点击切换</title>
    <style>
      * {
        box-sizing: border-box;
      }

      .slider {
        width: 560px;
        height: 400px;
        overflow: hidden;
      }

      .slider-wrapper {
        width: 100%;
        height: 320px;
      }

      .slider-wrapper img {
        width: 100%;
        height: 100%;
        display: block;
      }

      .slider-footer {
        height: 80px;
        background-color: rgb(100, 67, 68);
        padding: 12px 12px 0 12px;
        position: relative;
      }

      .slider-footer .toggle {
        position: absolute;
        right: 0;
        top: 12px;
        display: flex;
      }

      .slider-footer .toggle button {
        margin-right: 12px;
        width: 28px;
        height: 28px;
        appearance: none;
        border: none;
        background: rgba(255, 255, 255, 0.1);
        color: #fff;
        border-radius: 4px;
        cursor: pointer;
      }

      .slider-footer .toggle button:hover {
        background: rgba(255, 255, 255, 0.2);
      }

      .slider-footer p {
        margin: 0;
        color: #fff;
        font-size: 18px;
        margin-bottom: 10px;
      }

      .slider-indicator {
        margin: 0;
        padding: 0;
        list-style: none;
        display: flex;
        align-items: center;
      }

      .slider-indicator li {
        width: 8px;
        height: 8px;
        margin: 4px;
        border-radius: 50%;
        background: #fff;
        opacity: 0.4;
        cursor: pointer;
      }

      .slider-indicator li.active {
        width: 12px;
        height: 12px;
        opacity: 1;
      }
    </style>
  </head>

  <body>
    <div class="slider">
      <div class="slider-wrapper">
        <img src="./images/slider01.jpg" alt="" />
      </div>
      <div class="slider-footer">
        <p>对人类来说会不会太超前了？</p>
        <ul class="slider-indicator">
          <li></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
        </ul>
        <div class="toggle">
          <button class="prev">&lt;</button>
          <button class="next">&gt;</button>
        </div>
      </div>
    </div>
    <script>
      // 1. 初始数据
      const sliderData = [
        {
          url: './images/slider01.jpg',
          title: '对人类来说会不会太超前了？',
          color: 'rgb(100, 67, 68)',
        },
        {
          url: './images/slider02.jpg',
          title: '开启剑与雪的黑暗传说！',
          color: 'rgb(43, 35, 26)',
        },
        {
          url: './images/slider03.jpg',
          title: '真正的jo厨出现了！',
          color: 'rgb(36, 31, 33)',
        },
        {
          url: './images/slider04.jpg',
          title: '李玉刚：让世界通过B站看到东方大国文化',
          color: 'rgb(139, 98, 66)',
        },
        {
          url: './images/slider05.jpg',
          title: '快来分享你的寒假日常吧~',
          color: 'rgb(67, 90, 92)',
        },
        {
          url: './images/slider06.jpg',
          title: '哔哩哔哩小年YEAH',
          color: 'rgb(166, 131, 143)',
        },
        {
          url: './images/slider07.jpg',
          title: '一站式解决你的电脑配置问题！！！',
          color: 'rgb(53, 29, 25)',
        },
        {
          url: './images/slider08.jpg',
          title: '谁不想和小猫咪贴贴呢！',
          color: 'rgb(99, 72, 114)',
        },
      ]
      
      //准备随机函数
      let random = Math.floor(Math.random()*sliderData.length)

     //获取元素
     let title = document.querySelector('.slider-footer p');
     let bgc = document.querySelector('.slider-footer');
     let img = document.querySelector('.slider-wrapper img');

     title.innerHTML = sliderData[random].title
     img.src = sliderData[random].url
     bgc.style.backgroundColor = sliderData[random].color

    //  增加对应的li的类名
    let lis = document.querySelector(`.slider-indicator li:nth-child(${random+1})`);
    lis.classList.add('active')
   </script>
  </body>
</html>
